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Cellulose network materials - compression molding and magnetic functionalization
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Biocomposites.
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. , 26 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2012:4
Keyword [en]
cellulose fiber, nanopaper, biocomposite, magnetic nanoparticle
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-91430ISBN: 978-91-7501-248-3 (print)OAI: oai:DiVA.org:kth-91430DiVA: diva2:510160
Presentation
2012-03-02, K2, KTH, Teknikringen 28, Stockholm, 10:00 (English)
Opponent
Supervisors
Funder
Knut and Alice Wallenberg Foundation, KCAD-8401
Note

QC 20120315

Available from: 2012-03-15 Created: 2012-03-15 Last updated: 2012-11-08Bibliographically approved
List of papers
1. A non-solvent approach for high-stiffness all-cellulose biocomposites based on pure wood cellulose
Open this publication in new window or tab >>A non-solvent approach for high-stiffness all-cellulose biocomposites based on pure wood cellulose
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2010 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 70, no 12, 1704-1712 p.Article in journal (Refereed) Published
Abstract [en]

All-cellulose composites are commonly prepared using cellulose solvents. In this study, moldable all-cellulose I wood fiber materials of high cellulose purity (97%) were successfully compression molded. Water is the only processing aid. The material is interesting as a "green" biocomposite for industrial applications. Dissolving wood fiber pulps (Eucalyptus hardwood and conifer softwood) are used and the influence of pulp origin, beating and pressing temperature (20-180 degrees C) on supramolecular cellulose nanostructure is studied by solid state CP/MAS C-13 NMR. Average molar mass is determined by SEC to assess process degradation effects. Mechanical properties are determined in tensile tests. High-density composites were obtained with a Young's modulus of up to 13 GPa. In addition, nanoscale cellulose fibril aggregation was confirmed due to processing, and resulted in a less moisture sensitive material.

Keyword
Wood, Mechanical properties, CP/MAS C-13 NMR, Heat treatment, Isostatic pressing
National Category
Chemical Sciences Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-26690 (URN)10.1016/j.compscitech.2010.06.016 (DOI)000281998000006 ()2-s2.0-77955846808 (Scopus ID)
Note
QC 20101130Available from: 2010-11-30 Created: 2010-11-26 Last updated: 2017-12-12Bibliographically approved
2. Cellulose nanofibrils decorated by inorganic nanoparticles and used in magnetic nanocomposite membranes of high toughness
Open this publication in new window or tab >>Cellulose nanofibrils decorated by inorganic nanoparticles and used in magnetic nanocomposite membranes of high toughness
(English)Manuscript (preprint) (Other academic)
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-91438 (URN)
Note

QS 2012

Available from: 2012-03-15 Created: 2012-03-15 Last updated: 2013-11-06Bibliographically approved

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